That's a pretty good list!

the Killer Eye (1999)
imo

Multiple Maniacs

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I believe Frog-g-g had a Giant Frog rape scene if I remember right.
good luck!

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I'm glad we could both use our lists to fill missing entries, but take into account that my list is public so anyone can add to it. Of course I'm moderating it and try to delete unappropriate entries. Lately I've seen Species 2 and deleted it from the list. There is only a scene of consenting sex, where man changes into a monster during intercourse. So I leave interpretation to you whether it's rape or not.
http://www.imdb.com/board/bd0000001/thread/164347583

Glad it could help, I was looking for one like this myself when I started it.

Nice thread. I was looking for this myself
It's like a party in my mouth and everybody's puking.

Check this list:
http://www.criticker.com/?fl&filter=e6917

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I think I love you, THANK YOU for pointing me towards Splice, monster rape AND incest? Yes please, instant win.
I notice a trend though, is cat people the one with the brother and sister who turn into panthers? I remember the scene between the sister and her boyfriend, but Im not sure I would qualify it as monster rape, nevertheless thanks for helping the list along.

If really cheesey Alien probing counts (using tentacles with a familar shape) then this movie qualifies: http://www.imdb.com/board/11587666/

Add Splice to the list. Not only is it a creature doing the raping, but it's incest also! lol
Cat People (1982)
Maybe!? Can't recall if there's a rape scene though?

Yes, people do seem to love that scene for some reason, not a big fan myself but put in context like that I guess it is pretty impressive.
The reason I didn't add it to the list was just that there really wasn't any monster rape/sex per se, but sure if you guys feel it should be full integrated with the rest of the list I guess Ill add it along with the Astronaut's Wife, no reason to discriminate against alien possessed humans.

Just how can you not put XTRO on the list, if you just put the birthing scene near the beginning of the film for no other reason than Sheer Awesomeness.
It's just a scene that is the highlight of the film, given it's low budget origins, and makes you wonder "Just how did they do that?".
I'm a sand pimp, and Myrtle and Pismo are my beaches!

Humungous